Victoria River Downs Ties, NT, 1998 (P1004), radiometric line data, AWAGS levelled

The radiometric, or gamma-ray spectrometric method, measures the natural variations in the gamma-rays detected near the Earth's surface as the result of the natural radioactive decay of potassium (K), uranium (U) and thorium (Th). The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose. This Victoria River Downs Ties, NT, 1998 (P1004), radiometric line data, AWAGS levelled were acquired in 1998 by the NT Government, and consisted of 90466 line-kilometres of data at 400m line spacing and 60m terrain clearance. To constrain long wavelengths in the data, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey data. This survey data is essentially levelled to AWAGS.

辐射测量法（radiometric method）或伽马射线光谱法（gamma-ray spectrometric method）用于测量地球表面附近检测到的伽马射线的自然变化，这些变化源于钾（K）、铀（U）和钍（Th）的自然放射性衰变。所采集的数据通过标准方法处理，以确保记录的响应仅来源于地下岩石。处理结果生成的数据集可用于解释，以揭示地下地质结构。处理后的数据由GA的地球物理学家（geophysicists）进行质量检查，以确保GA发布的最终数据符合用途。
这套1998年北领地（NT）维多利亚河唐斯关联（Victoria River Downs Ties, NT, 1998，编号P1004）的经AWAGS校正的辐射测量线数据由NT政府于1998年采集，包含90466线公里的数据，线间距为400米，地形净空高度为60米。为约束数据中的长波长成分，使用了独立数据集——全澳航空地球物理调查（Australia-wide Airborne Geophysical Survey，AWAGS）航空磁测数据——来控制该测量数据的基准面。该测量数据本质上已校正至AWAGS基准。